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S. P. THOMPSON.

UME lAND DATE mmc/non. APPLICATIONl FILED lU-LY 29.191.

Patented July 22, 1919.

Enauley ThumpL-mn @2M hay THE COLUMBIA PLANocIRml cil., WASHINGTQN, D. E.

SLP.'4 THOMPSON. TuvlE ANO DATE INDICATOR. APPLICATIONFILED IULY 29,1918.

Patented July 2.2, 19121 's sums-SHEET 2.

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l Stan'l/"E Thumpscm s. P. THOMPSON. UME AND om momma. APPLlcATloN msn luLv 29.1918.

' Patented July 22, 1919.

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' elapsing STANLEY P. THOMPSON, 0F SEATTLE, WASHINGTON.

TIME AND DATE TNDICATOR.

Specication of Letters Patent.

Patented July 22, 1919.

Application filed July 29, 1918. Serial No. 247,164.

To all 'whom t may concern:

Beit known that I, STANLEY P. THOMP- soN, a citizen of the United States, and resident of the city of `Seattle, countyv of King, and State of Washington, have invented certain new and useful Improvements in Time and Date Indicators, of which the following is a specification.

My invention relates to devices employed for determining by direct reading, the time between different dates, the dates upon which certain time periods begin or end, and the day of the week of any date, either in the past or future, and for determining questions relating to time and dates.

Y lIt may, therefore, be called an adjustable l Y radial line on line 2-2 of Fig. 1. U

Fig" 3 is 2m enlarged aCe View showing and universal time indicating calendar.

The object of my inventionis to provide a devicefor the use, more particularly, of people handling business connected with financial transactions involving the liguring of interest, discount, and dates when obligations become due, and to provide a device which may furnish the information of this kind which is desired' both exjg'ieditiously'and with as little requirement for mental fguring as is possible, while at the same time contributing to accuracy of result. 1

The principles of my 'invention and the manner of its use Vwill be hereinafter described and are illustrated in the accompanying drawings, in the particular form of construction which'I now most prefer to use. The features which I considerv to be novel and upon which I desire patent protection, will be particularly dened by the claims which terminate this speciiication.V

Figure 1 is a face view of the complete device.

Fig. 2 is a transverse section taken on a a quandrant which contains the indicating table or'chart by which the device is set to adjust it for any particular year.

Fig. 4 is an enlarged face view of th quadrant which contains the scale used to adjust the relations of the days of the week at the beginning and ending of the year.

In banks and business houses having to -do with discounts and interest payments, it

isdesirable and savesmuch time, as well as contributing to accuracy, to-have some device which may be quickly operated to indicate thetimefactors of the problems as they `come upav It is the purpose of my invention to provide an easily operated device which will do this and which is also accurate and reliable. The particular` construction shown in the accompanying drawings will herein be specifically described as bemg that now preferred by me, although not necessarily being the only `construction which falls within the scope of my invention.

The physical construction of the device as illustrated is as follows.

Acard or plate 4 forms the base upon which the movable parts are pivoted, as by apivot 11. These pivoted or rotatable parts comprise the disks 2and 3 and the disk 1, the disks 2 and 3 being parts which directly contribute to lthe functioning of the device, while the disk 1 is more of a convenience than an essential.

The disk 1 functions or washer to hold'the disks 2 and 3 in shape and prevent their being bent up or broken and to hold them closely against each other and down upon the base 4. This disk 1 may be made of metal, wood, or of any suitable artificial fiber or plateimaterial. It is'preferf ably turnable on the j might be iiXedly secured to the base 4.

The disk 2 has two-circular bands or columns of figures, 20 and 21, just within its other increases in the opposite direction.`

The reading is taken from one of these columns for `dates in the future and from the other column for dates in the past. The diskP has two bands orrings, 30 and 31, just within it periphery. Theband or ring 3l is divided into twelve sectors, one for each month of the year, each being provided with the name of 4themonth which it represents and extending over as many of the day spaces as there are days in the month. The day spaces in these sectors are numbered from one up. j The base 4 has a circular ring just without the periphery of the disk 3 which is laid out in 365 equal spaces, similarly to and matching with the numbered spaces in the rings 2O and 21 of disk 2, and the numbered spaces of ring 30. In these spaces the names of the days of the week are printed in their proper sequential order. As the ring 30 has therein the date numbers of the months and it is adjustable relative to the ring 40, if the `pivot 11, although it disk 3 be properly set, the day of the week upon which any date has fallen or will fall, may be immediately observed.

At one or more places on the base el, for convenience preferably in the corners ofthe square outline thereof, are placed a list .or lists, 6, of year numbers, arranged in serial relation, with all leap years given` twice, one

of these duplicate year numbers preferably being contrasted, by color or otherwise from the other, to facilitate operation and instruction. I have shown the first ofeach of these duplicate Vyear numbers by white iigures on al black ground. In printing, the ground may be anysuitable color and the igu-resmay be then printed inI black, as are the others, the colory contrast of the back ground` being. sufficientv toy secure the vattention desired. i. v

yThe extent of these'yearnumbers may be made anything desired'. The spaces occupied conform with the spacing of the rings 20, E21, SOand 4-0, and theyear nmnbers. are so placed,y with relation to the numbering on theserings, that when the4 pointer 32 carried by the 'disk 3. is placed opposite any year number, it will bring the numbersv in the month segments of ring 30, in relation with the days of the week, as shown in the ring l, as'shownon thedays-of-the-week circle 40, must show the same day ofthe week for these twoy adjacent spaces in circle 450. To

secure this when the device is adjusted for -a series of years, I provide the following means.

Secured to the disk 31s a segment 5 of a transparent material, as of clear Celluloid,

which extends a distance each side of theline representing the termination and the beginning of the year. On the base 4 is provided a sector' 41, just outside the ring 4Q=,=having days of the week printedtherein, this covering an arc which covers the maximum adjustment given the disk 3 in setting it for the different years, and includes therein the beginning and end of the year as indicated thereon. This extends over an arc equa-l to that ofthe transparent plate 5. The days of the week as shown on this sector are arranged sequentially, and consequently,

they are one behind those for the month of January, in the part which is opposite that month.

The plate 5-has two segments, 50 and 51, which are made opaque, or at least sufliciently opaque to screen or obscure whatever is behind them. As this screen or 'shutter plate is mounted upon the disk 3 which carries the monthly indications, it moves with it. It, therefore, screens the names of the days in the ring 40 by the opaque segment 5l and the names of the days in thefsector l1 by the opaque segment 50. In consequence, as the disk 3 is adjusted for the year, as indicatedupon the segmentally arranged table 6, two like days of the, week are at all times maintained together at the ends of the year except leap year. The angular extent ofthe plate 5 should equal twice that of the maximum length of the segment occupied by the years table G.

In using my device the pointer 32f is set to indicate the year., If this is a leap year,

` the pointer is set upon the black space containing the year, for all dates in January and February, and on the white space containing the `year number for the remainder ofthe yea-r. v

If it is desired to determine a date any number ofdays ahead or back from a given date, thedisk 9. is turned so as to bring the arrow 12 and the space containing the iignres 365, opposite the date as shown inring 30, from which the computation is to be made. If the date is one lin the future, the inner ringi20 is used, this being followed aroundA until the figure representing the desired number of days is reached, opposite which in `columnBO will be found the date.. If the date is one in the past, tlieyring 2l is used in like manner.;

If the number of daysintervening between two dates is desired, the disk 2 is similarly Seton oneof the dates and the number found opposite the other dategivesthenumber of days` which intervene.

By using the ring days of the'week, the condition as toSundays and holidays of the date of beginning and'ending` of any time period, is shown, and the date of actual payment of' an obligation with the true interest or discount period, may be exactly and immediately told.

It is believed that the manner of operating the device has been suiliciently described so `that further amplification thereof is not necessary. In using a cover plate or disk, as l, I prefer that it be secured insome way to turn with thefuppermost indicating disk, that is, with the disk 2.

The pointer 82 may be made of a size to give a suflilcient upward projection that it may forma convenient handle by which to turn the disk 3. Y

In using this device it would be set for the day and left in this adjusted form, until it was necessary to figure a problem based upon another date.

What Iv claim as my invention is:

1. A date indicatorcomprisingtwodisks 40, or 41,- showing the mounted for relative rotative movement about a common point, one of said disks having thereon a circular band with the months of the years and the numbers of the days in the months, arranged in sequential order, the other having an adjacent ring containing the days of the week arranged in sequential order, and alongside of this an arc having therein the days ofthe week arranged in sequential order and extending each way from the point in said ring which represents the first of the year, said markings in the arc matching with the markings of that part of the ring which represents the month of December, and a screen carried by the other disk and having two opaque segments extending from a common central point in opposite directions, one acting to screen the days of the week in the ring and the other to screen the days of the week in the arc.

2. A date indicator comprising two disks mounted for relative rotative movement about a common center, one of said disks having the months and the days of the month upon a peripheral band and the other having adjacent to said band and arranged in sequential order the days of the week for the year spaced to match with the gures of the first named band, and also having alongside its own ring and extending in opposite directions from the point representing the first of the year, a set of names of the days of the week similarly spaced and arranged to match with those of the ring which lie just prior to the end of the year, a screen carried by the first named disk and having two opaque segments extending oppositely from a common point and adapted respectively to cover a part of the main ring representing the days prior to January first and the other to cover a part of the supplemental arc representing the days after December 31st, one of said disks having a segmental table giving the years and the other having a pointer cooperating with the said table.

3. A device as in claim 2 in which leap years are given a double spacing in said table.

Signed at Seattle, Washington, this 22nd day of July, 1918.

sTANLE'Y P. THoMrsoN.

00p!" 0f this patent may be obtained for ve cents each, by addressing the Commissioner of Patents.

' Washington, D. C." 

